Product Review · Air Purifiers · #3 Ranked
Blueair 311i Max
Air purifiers — medium-room smart HEPASilent, ultra-quiet · Reviewed by Katie · amazon.com live, Sept 28 2026
Why it scored a 82
At $229.00 the Blueair 311i Max is a medium-room smart purifier favored by Consumer Reports and TechGearLab. Satisfaction leads at 90 and Reliability at 88, with Value at 84 on 314 CFM of dust CADR, a 7.3-pound body, and roughly $60 a year in filters. Quality sits at 74 because HEPASilent is not true HEPA and carries an always-on low-ozone ionizer, the carbon load is small for odors, and the child lock is easily bypassed; the 1-year base warranty, 3 with registration, keeps Warranty at 78. It is for a bedroom or living area where a whisper-quiet, app-connected unit matters more than odor control.
What you're getting
- CADR 365 pollen / 314 dust / 283 smoke CFM
- 444-465 sq ft recommended room; 2,107 sq ft/hr at 1 ACH
- 23-50 dB official (TechGearLab measured 28.6 / 40 / 47.9 dB)
- Particle & Carbon filter ~$37.50-52.50 every 9 months (~$60/yr)
- Washable fabric pre-filter; 7.3 lb; ~19 x 11 x 11 in; ~38 W max
- PM2.5 sensor auto mode, night mode, child lock (easily bypassed)
- Wi-Fi + Blueair app, Alexa/Google, RealTrack filter tracking, geofencing
- HEPASilent with always-on low-ozone ionizer, not true HEPA; 1-yr warranty (3 registered)
ViperScore breakdown
At a glance
- CADR 365 pollen / 314 dust / 283 smoke CFM
- 444–465 sq ft room; 23–50 dB; 7.3 lb
- Filter ~$60/yr every 9 months; 1-yr warranty (3 registered)
- Price$229.00
- TierAir purifiers — medium-room smart HEPASilent, ultra-quiet
- Category rank#3 of 10
Should you buy the Blueair 311i Max?
The Blueair 311i Max is the medium-room purifier for people who want the fan to disappear into the background. Its HEPASilent system pairs an ionizer with a media filter, so it moves a lot of air (CADR up to 365 CFM on pollen) while staying quieter than a conventional HEPA unit at the same setting. At 7.3 lb it is also the lightest mid-size option we rank, and it lands third of ten. If you want a true HEPA filter with no ionizer, the Coway Airmega Mighty2 is the closest alternative.
Where it earns its score
- Highest CADR in the group. 365 pollen / 314 dust / 283 smoke CFM, rated for a 444 to 465 sq ft room, and 2,107 sq ft per hour at one air change.
- Genuinely quiet. TechGearLab measured 28.6, 40 and 47.9 dB across the three speeds, and the official range starts at 23 dB.
- Light and efficient. About 7.3 lb and roughly 38 W at maximum, so it moves room to room and runs all day.
- Useful app. Wi-Fi with the Blueair app, Alexa and Google, RealTrack filter tracking and geofencing.
What to know first
- Not true HEPA. HEPASilent combines electrostatic charging with a media filter and an always-on low-ozone ionizer. If you want zero ionization, choose the Coway or Levoit units.
- Short standard warranty. One year out of the box, extended to three only when you register.
- Child lock is easy to bypass. Do not count on it to keep a toddler off the buttons.
- Quality is the weakest factor. The fabric-and-plastic build scores 74. The Particle and Carbon filter runs $37.50 to $52.50 every 9 months, about $60 a year.
Our verdict
The Blueair 311i Max scores 82, a Good Buy. Choose it over the Levoit Core 400S when noise is your top complaint or you want more CADR per dollar in a 450 sq ft room. Choose the Core 400S if you want a true HEPA filter, a longer default warranty and the bigger user base.
Levoit Core 400S
Questions buyers ask
Is the Blueair 311i Max a true HEPA purifier?
No. It uses Blueair's HEPASilent technology, which charges particles with a low-ozone ionizer and captures them in a media filter. It performs well but is not rated as true HEPA.
How much does the Blueair 311i Max filter cost?
The Particle and Carbon filter costs about $37.50 to $52.50 and lasts up to 9 months, so budget around $60 a year.
What is the Blueair 311i Max warranty?
One year standard, extended to three years if you register the unit with Blueair.
Ready to check it out?
Blueair 311i Max · ViperScore 82 · Good Buy · $229.00
How the other 9 air purifiers scored
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